TagBot cannot see the pull request

I’m trying to use a TagBot for a package I’m writing (here GitHub - GianlucaMastrantonio/BayesSizeAndShape.jl: Bayesian regression models for size-and-shape data).
I registered the new version of my package, but the TagBot give me this error

Did not find registry PR
processing version v0.1.3
Generating changelog for version v0.1.3
Warning: No registry pull request was found for this version
Error: TagBot experienced an unexpected internal failure

I have no idea how to fix it.